package com.yang.springcloud.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.yang.springcloud.entities.CommonResult;
import com.yang.springcloud.entities.Payment;
import com.yang.springcloud.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

/**
 * @author yang
 * @date 2021/3/7--21:21
 */

@RestController
@Slf4j
public class CircleBreakerController {
    public static final String SERVICE_URL ="http://nacos-payment-provider";

    @Resource
    private RestTemplate restTemplate;

    @RequestMapping("/consumer/fallback/{id}")
    //@SentinelResource(value = "fallback")
    //@SentinelResource(value = "fallback",fallback = "handlerFallback")
    //@SentinelResource(value = "fallback",blockHandler = "blockHandler")
    @SentinelResource(value = "fallback",fallback = "handlerFallback",blockHandler = "blockHandler",
            exceptionsToIgnore = {IllegalArgumentException.class})
    public CommonResult<Payment> fallback(@PathVariable Long id)
    {
        CommonResult<Payment> result = restTemplate.getForObject(SERVICE_URL+"/paymentSQL/"+id,CommonResult.class,id);

        if(id == 4)
        {
            throw new IllegalArgumentException("IllegalArgumentException,非法参数异常");
        }else if(result.getData()==null)
        {
            throw new NullPointerException("NullPointerException,空指针异常");
        }
        return result;
    }

    public CommonResult handlerFallback(@PathVariable Long id,Throwable e)
    {
        Payment payment =new Payment(id,"null");
        return new CommonResult<>(444,"兜底异常handlerFall,exception内容:"+e.getMessage(),payment);
    }

    public CommonResult blockHandler(@PathVariable Long id, BlockException blockException)
    {
        Payment payment =new Payment(id,"null");
        return new CommonResult<>(445,"blockException限流,无此流水:"+blockException.getMessage(),payment);
    }

    @Resource
    private PaymentService paymentService;

    @GetMapping(value = "/consumer/paymentSQL/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id)
    {
        return paymentService.paymentSQL(id);
    }
}
